Document Type

Article

Publication Date

2011

DOI

10.1016/j.physletb.2011.09.075

Publication Title

Physics Letters B

Volume

704

Issue

5

Pages

467-473

Abstract

We present first measurements of the evolution of the differential transverse momentum correlation function, C, with collision centrality in Au + Au interactions at √sNN = 200 GeV. This observable exhibits a strong dependence on collision centrality that is qualitatively similar to that of number correlations previously reported. We use the observed longitudinal broadening of the near-side peak of C with increasing centrality to estimate the ratio of the shear viscosity to entropy density, η / s , of the matter formed in central Au + Au interactions. We obtain an upper limit estimate of η / s that suggests that the produced medium has a small viscosity per unit entropy.

Comments

Open access under CC BY license.

Original Publication Citation

Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alakhverdyants, A. V., Alekseev, I., Alford, J., . . . Zoulkarneeva, Y. (2011). Evolution of the differential transverse momentum correlation function with centrality in Au + Au collisions at √sNN = 200 GeV . Physics Letters B, 704(5), 467-473. doi:https://doi.org/10.1016/j.physletb.2011.09.075

ORCID

0000-0002-5680-1814 (Bueltmann)

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